145mm Giant Large Sand Timer Connector Airtight sealed all round

Airtight sealed all round

Wooden storage box to protect the kit

flaring and for the treatment of chronic idiopathic urticaria

maintenance-free construction

and watch in wonder as the sparks fly

145mm Giant Large Sand Timer Connector Airtight sealed all round145mm tall, large sand timer 80mm square base (top and bottom) prevents rolling. 30 seconds has the time value embossed on the top. Large Sand Timer 30 seconds also has Blue Color coded grains of sand. Excellent for classroom projects and purposes, Group projects, educational purposes, laboratory demonstration. If you need custom order with different sizes design, please contact us. Safely Packaged to avoid being damaged during transportation.